You never know when your projectors lamp might fail, so its smart to carry a back-up on business trips or keep a spare one at the presentation facility. This replacement lamp from Dell™ is a life-saver, if your projectors bulb burns out. This durable lamp will give you Approx. 3000 hours of excellent, crisp & clear brightness. This product has been tested & validated on Dell™ systems. It is supported by Dell Technical Support when used with a Dell projector.DISCLAIMER: The actual operating life span of a projector lamp will vary according to operating conditions & usage patterns. Usage of a projector in stressful conditions which may include dusty environments, under high temperatures & abrupt powering-off may result in a lamps shortened operating life span or possibly lamp failure. The lamp life specified for Dells projectors refers to the typical time under non-stressful operating conditions for more than 50% of a sampling population to reduce to Approx. 50% of the lamps rated brightness level. It is not the measure of time a lamp will cease light output.